• 제목/요약/키워드: Xu Jing

검색결과 196건 처리시간 0.034초

Antibacterial Constituents from Fruit Bodies of Ascomyce Bulgaria inquinans

  • Zhang Peng;Li Xian;Li Ning;Xu Jing;Li Zhan-Lin;Wang Yi;Wang Jin-Hui
    • Archives of Pharmacal Research
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    • 제28권8호
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    • pp.889-891
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    • 2005
  • Two ergosterins and two triterpenoids were isolated from the dried fruit bodies of Ascomyce Bulgaria inquinans. By means of chemical (hydrolysis) and spectroscopic methods (NMR, EIMS), their structures were established as betuinic acid (1), cerevisterol (2), (24R)ergosta-7, $22E­diene-3\beta,\;5\alpha,\;6\beta-triol-3-O-palmitate$ (3) and ursolic acid (4). Compound 3 is a new compound.

Pd(II) Catalyzed Copolymerization of Styrene and CO in Quaternary Ammonium Ionic Liquids

  • Tian, Jing;Guo, Jin-Tang;Zhu, Cheng-Cai;Zhang, Xin;Xu, Yong-Shen
    • Macromolecular Research
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    • 제17권3호
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    • pp.144-148
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    • 2009
  • Poly(1-oxo-2-phenyltrimethylene) was synthesized by palladium-catalyzed copolymerization of styrene and carbon monoxide in quaternary ammonium ionic liquids. The $[Pd(bipy)_2][PF_6]_2$ compound had relatively more catalytic activity than $[Pd(bipy)_2][BF_4]_2$ in ionic liquids. The catalytic activity of palladium (II) composite catalyst was superior to the catalyst formed in situ from palladium acetate, 2,2-bipyridyl, and $X^-$ ($X^-=PF_6^-$, $BF_4^-$) in ionic liquids. The effects of the volume of ionic liquids, reaction time and benzoquinone content on the copolymerization were also described.

Saliency-Assisted Collaborative Learning Network for Road Scene Semantic Segmentation

  • Haifeng Sima;Yushuang Xu;Minmin Du;Meng Gao;Jing Wang
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • 제17권3호
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    • pp.861-880
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    • 2023
  • Semantic segmentation of road scene is the key technology of autonomous driving, and the improvement of convolutional neural network architecture promotes the improvement of model segmentation performance. The existing convolutional neural network has the simplification of learning knowledge and the complexity of the model. To address this issue, we proposed a road scene semantic segmentation algorithm based on multi-task collaborative learning. Firstly, a depthwise separable convolution atrous spatial pyramid pooling is proposed to reduce model complexity. Secondly, a collaborative learning framework is proposed involved with saliency detection, and the joint loss function is defined using homoscedastic uncertainty to meet the new learning model. Experiments are conducted on the road and nature scenes datasets. The proposed method achieves 70.94% and 64.90% mIoU on Cityscapes and PASCAL VOC 2012 datasets, respectively. Qualitatively, Compared to methods with excellent performance, the method proposed in this paper has significant advantages in the segmentation of fine targets and boundaries.

고려시대 사람들의 삶과 전통의상에 대한 고찰 (A Study of People's Lives and Traditional Costumes in Goryeo Dynasty)

  • 최규성
    • 복식문화연구
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    • 제12권6호
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    • pp.1060-1069
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    • 2004
  • We can study and judge the costumes of the Three Kingdom period through an ancient tomb murals and various burial mound(clay) figures, however, it is quite difficult to search for costumes of the Goryeo period ($960{\sim}1392$), because dresses from this era were rarely found, related antiquities are limited and hard to survive. This is the reason why people say that the Goryeo Dynasty is the period of undiscovered era for its history of costumes in Korea. Fortunately, these days, there are various kinds of buddhist statues discovered with its burial accessories such as costumes and dyed fabrics of the Goryeo era. Through these, we can glimpse through the Goryeo cloths and develop our researches on this field. In addition, a man called Seo Geung(서긍, the Chinese scholar Xu Jing) wrote a book in the 12th century about peoples lives in Goryeo and in this book, there are few documents about the people's costumes which help us to understand the period's traditional dresses. In this paper, we will look for the traditional costumes which were formed and developed through people's lives in Goryeo, using remains from various burial accessories in buddhist statues as well as the documents related to the costumes written in ${\ll}$Goryeosa 고려사${\gg}$. Moreover, costumes of a period usually developed and influenced by the atmosphere of people's lives both economically and mentally, therefore, in this study, we will especially focus on the dresses of the bureaucratic officials and their wives, who led comfortable lives and latitude of mind. Through the records, like Silla, Goryeo exported Sehjeo(세저) and Sehjoongmapo(세중마포) to China. And we found out that Silla's skillful weaving techniques of hemp and ramie cloths were succeeded to Goryeo. According to above facts, Goryeo people made clothes with various kinds of fabrics such as, different sorts of silks, ramie, hemp cloths and cottons. They also have very skillful manufacturing techniques for certain textiles. Their official robes were generally influenced by Tang and Song Dynasty, but, like ordinary people, we found out that the government officials also wore baji(pants) and a jeogor(jacket), which were traditional costumes since the Unified Silla Kingdom with various coats. Especially, women's costumes such as jeoksam(unlined summer jacket) and hansam(한삼), which are sort of jeogori(jacket), baji(pants) and chima(skirts) were made of various kinds of silks and ramie cloths, that were generated from the Goguryeo Kingdom, with jikryeongpo(a long jacket and striped skirt).

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Functional Characterization of aroA from Rhizobium leguminosarum with Significant Glyphosate Tolerance in Transgenic Arabidopsis

  • Han, Jing;Tian, Yong-Sheng;Xu, Jing;Wang, Li-Juan;Wang, Bo;Peng, Ri-He;Yao, Quan-Hong
    • Journal of Microbiology and Biotechnology
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    • 제24권9호
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    • pp.1162-1169
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    • 2014
  • Glyphosate is the active component of the top-selling herbicide, the phytotoxicity of which is due to its inhibition of the shikimic acid pathway. 5-Enolpyruvylshikimate-3-phosphate synthase (EPSPS) is a key enzyme in the shikimic acid pathway. Glyphosate tolerance in plants can be achieved by the expression of a glyphosate-insensitive aroA gene (EPSPS). In this study, we used a PCR-based two-step DNA synthesis method to synthesize a new aroA gene ($aroA_{R.\;leguminosarum}$) from Rhizobium leguminosarum. In vitro glyphosate sensitivity assays showed that $aroA_{R.\;leguminosarum}$ is glyphosate tolerant. The new gene was then expressed in E. coli and key kinetic values of the purified enzyme were determined. Furthermore, we transformed the aroA gene into Arabidopsis thaliana by the floral dip method. Transgenic Arabidopsis with the $aroA_{R.\;leguminosarum}$ gene was obtained to prove its potential use in developing glyphosate-resistant crops.

Selective miRNA Expression Profile in Chronic Myeloid Leukemia K562 Cell-derived Exosomes

  • Feng, Dan-Qin;Huang, Bo;Li, Jing;Liu, Jing;Chen, Xi-Min;Xu, Yan-Mei;Chen, Xin;Zhang, Hai-Bin;Hu, Long-Hua;Wang, Xiao-Zhong
    • Asian Pacific Journal of Cancer Prevention
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    • 제14권12호
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    • pp.7501-7508
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    • 2013
  • Background: Chronic myeloid leukemia (CML) is a myeloproliferative disorder of hematopoietic stem cell scarrying the Philadelphia (Ph) chromosome and an oncogenic BCR-ABL1 fusion gene. The tyrosine kinase inhibitor (TKI) of BCR-ABL1 kinase is a treatment of choice for control of CML. Objective: Recent studies have demonstrated that miRNAs within exosomes from cancer cells play crucial roles in initiation and progression. This study was performed to assess miRNAs within exosomes of K562 cells. Methods: miRNA microarray analysis of K562 cells and K562 cell-derived exosomes was conducted with the 6th generation miRCURYTM LNA Array (v.16.0). Gene ontology and Kyoto Encyclopedia of Genes and Genomes (KEGG) analyses were also carried out. GO terms and signaling pathways were categorized into 66 classes (including homophilic cell adhesion, negative regulation of apoptotic process, cell adhesion) and 26 signaling pathways (such as Wnt). Results: In exosomes, 49 miRNAs were up regulated as compared to K562 cells, and two of them were further confirmed by quantitative real-time PCR. There are differentially expressed miRNAs between K562 cell derived-exosomes and K562 cells. Conclusion: Selectively expressed miRNAs in exosomes may promote the development of CML via effects on interactions (e.g. adhesion) of CML cells with their microenvironment.

Nonlinear Kalman filter bias correction for wind ramp event forecasts at wind turbine height

  • Xu, Jing-Jing;Xiao, Zi-Niu;Lin, Zhao-Hui
    • Wind and Structures
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    • 제30권4호
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    • pp.393-403
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    • 2020
  • One of the growing concerns of the wind energy production is wind ramp events. To improve the wind ramp event forecasts, the nonlinear Kalman filter bias correction method was applied to 24-h wind speed forecasts issued from the WRF model at 70-m height in Zhangbei wind farm, Hebei Province, China for a two-year period. The Kalman filter shows the remarkable ability of improving forecast skill for real-time wind speed forecasts by decreasing RMSE by 32% from 3.26 m s-1 to 2.21 m s-1, reducing BIAS almost to zero, and improving correlation from 0.58 to 0.82. The bias correction improves the forecast skill especially in wind speed intervals sensitive to wind power prediction. The fact shows that the Kalman filter is especially suitable for wind power prediction. Moreover, the bias correction method performs well under abrupt weather transition. As to the overall performance for improving the forecast skill of ramp events, the Kalman filter shows noticeable improvements based on POD and TSS. The bias correction increases the POD score of up-ramps from 0.27 to 0.39 and from 0.26 to 0.38 for down-ramps. After bias correction, the TSS score is significantly promoted from 0.12 to 0.26 for up-ramps and from 0.13 to 0.25 for down-ramps.

"주역참동계(周易參同契)"와 주석서에 대한 서지학적(書誌學的) 연구 (Study on bibliography of "Zhouyi cantong qi(周易參同契)" and the Book of Annotation)

  • 임명진;김병수;강정수
    • 혜화의학회지
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    • 제19권2호
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    • pp.25-33
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    • 2011
  • Daoism is a very important subject that consists of oriental medicine(traditional east asia medicine). Among the many scriptures, The Zhouyi cantong qi (周易參同契, Token for Joining the Three in Accordance with the Book of Changes) is the main Chinese alchemical scripture. This book is composed with three kinds of subject, Zhouyi(周易, the Book of Changes), the Huanglao(黃老) Tradition and alchemy(鍊金, 爐火). The author's name is not signed but is concealed in the text. According to the traditional account, the legendary Han immortal from Guiji (會稽, in present-day Zhejiang, 古 浙江), Wei Boyang(魏伯陽), wrote it in the period between Emperor Shun and Emperor Huan of the Eastern Han (126-127 BC), after reading the Longhu jing (龍虎經, Scripture of the Dragon and Tiger). Later he transmitted it to Xu Congshi(徐從事), who appended a commentary, and to Chunyu Shutong(淳于叔通), who first circulated it in the world. While some features of this account provide significant details - especially about the reputed date of the text and about its formation having taken place in stages - the received Cantong qi(參同契) actually is not the product of a single generation of authors, but the result of several centuries of textual accretions as well as theory of three co-authorship by Wei Boyang(魏伯陽), Xu Congshi(徐從事), Chunyu Shutong(淳于叔通). It has over 6000 characters in four-word or five-word verses. Some parts of the book are in styles of prose and poem. Many scholars explain the title "cantongqi(參同契)", saying that "Can(參)" means three, "Tong(同)" means correspondence, and "Qi(契)" means unification. Through images of hexagrams of the Book of Changes, the book illustrates the thought of the Huanglao(黃老) Tradition and alchemy. Wei Boyang(魏伯陽) theorizes his own experience unifying the way of intercourse of Yin and Yang in the Book of Changes, the cultivation of spirit through spontaneity of the Huanglao(黃老) Tradition and the elixir refining of alchemy.

Inpatients' Knowledge about Primary Liver Cancer and Hepatitis

  • He, Wen-Jing;Xu, Ming-Yan;Xu, Rui-Rui;Zhou, Xiao-Qiong;Ouyang, Jun-Jie;Han, Hui;Chen, Geng-Zhen
    • Asian Pacific Journal of Cancer Prevention
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    • 제14권8호
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    • pp.4913-4918
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    • 2013
  • Objective: To assess the level of an inpatient population's awareness about hepatitis and primary liver cancer (PLC), the most common type of which is hepatocellular carcinoma (HCC), and then to initiate education of this group. Methods: A survey was conducted with 1300 participants within the inpatient unit in representative tertiary hospitals in the Chaoshan area of China. Structured questionnaires contained demographic data and statements about different aspects of liver cancer and hepatitis. The questionnaires were completed by trained medical practitioners after they had conducted the interviews. Results: One way ANOVA showed that the sample population lacked adequate knowledge about HCC and hepatitis. Stepwise multiple regression analysis demonstrated that the participant's level of education had the greatest impact on their total knowledge score when other variables remained constant. Conclusions: The study demonstrated: a general lack of awareness amongst the participants about the preventative strategies, and the management options available for people with primary liver cancer and hepatitis; education level was an important factor affecting knowledge levels. The demonstrated deficiencies in people's knowledge about hepatitis and HCC, and their lack of subsequent protective behaviours are likely to play an important role in HCC and hepatitis transmission or prevention.